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282

DEERLETS

Fam.  4.   Tra&ulidae.—This   family  comprises  a  number   c

small Deer-like animals, which are really In many points mor
related to the Pigs than to the true Beer. They are known a
Cfaevrotains ; and the term " Beerlet/' introduced by Professo
Garrod, Is certainly appropriate, since they have the aspect o
very small and hornless Beer. If it were not for their Artio
dactyle feet one might at a glance confuse these creatures wit]
some Marsupial type. The family is Oriental and "West Africai
in range. The two genera (whose individual peculiarities wil

FIG. 147.—Indian Chevrotam.     Tragulus meminna-     x

be considered later) differ from other Artiodactyles in a number
of rather important characters.
They are absolutely hornless in both sexes. The canines are
present In both jaws, and are especially well developed in the
upper jaw. The dental formula is I % C ^ Pm -§- M f. In the
skull the tympanic bulla is usually, as in the non-ruminating
Artiodactyles, filled with loose bony tissue. The feet (usually) have
the four toes of the Suina, and are therefore in a more primi-
tive condition than in Beer and Antelopes. But as the middle
metacarpals are fused In TraguLus (though separate in Hyomoschus)
they are a stage further than are the Pigs, in the direction of the
typical Hmmiiiamts.
The  atonacii  is comparatively simple, thus   offering   inter-